[core] Organize GCC compilation flags

builder/family/realtek-ambz2.py

@@ -21,30 +21,14 @@ queue.AppendPublic(
         "-mthumb",
         "-mcmse",
         "-mfloat-abi=soft",
-        "-g",
-        "-gdwarf-3",
-        "-Os",
-        "-MMD",
-        "-fstack-usage",
-        "-fdata-sections",
-        "-ffunction-sections",
-        "-fmessage-length=0",
-        "-fno-common",
         "-fno-short-enums",
-        "-fomit-frame-pointer",
-        "-fsigned-char",
     ],
     CFLAGS=[
-        "-std=gnu99",
-        "-Wall",
         "-Wpointer-arith",
         "-Wno-write-strings",
         "-Wno-maybe-uninitialized",
     ],
     CXXFLAGS=[
-        "-std=c++11",
-        "-fno-exceptions",
-        "-fno-rtti",
         "-fno-use-cxa-atexit",
     ],
     CPPDEFINES=[
@@ -68,19 +52,9 @@ queue.AppendPublic(
         "-mthumb",
         "-mcmse",
         "-mfloat-abi=soft",
-        "-g",
         "--specs=nosys.specs",
-        "-nostartfiles",
-        "-nodefaultlibs",
-        "-nostdlib",
-        "-Os",
-        "-Wl,--gc-sections",
-        "-Wl,--warn-section-align",
-        "-Wl,--cref",
-        "-Wl,--build-id=none",
         "-Wl,--use-blx",
         "-Wl,--undefined=gRamStartFun",
-        "-Wl,-no-enum-size-warning",
         "-Wl,-wrap,aesccmp_construct_mic_iv",
         "-Wl,-wrap,aesccmp_construct_mic_header1",
         "-Wl,-wrap,aesccmp_construct_ctr_preload",
@@ -362,6 +336,11 @@ queue.AddLibrary(
         "+<src/include>",
         "+<src/include/netif>",
     ],
+    options=dict(
+        CFLAGS=[
+            "-Wno-implicit-function-declaration",
+        ],
+    ),
 )
 
 # Sources - mbedTLS